Replacement channel balances

Hi there!

Thanks for reaching out to us. It looks like our S380-26 or S385-26 channel balance matches what you have here. The important difference between these parts is the depth of the bottom fitting as shown below. 

Your "25 9" stamp is outdated, though. With that said, you'll need to weigh your sash and refer to the chart under the product description on the S380 and S385 store pages to determine the appropriate spring strength option for your balance.

Comparison of the S378, S380 and S385 balance shoes.

Yep, you got it! The correct strength option will depend on the weight of the window sash.